Ontario
Distance (km)
to
Marathon Calendar Ontario 2026-2027
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
Explore the best marathons in Ontario for 2026-2027! Our updated list features 20 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!
July 2026
August 2026
September 2026
October 2026
February 2027